Method of producing placards with sunk characters or imprints.



5 H. FLOOK.

- METHOD OF PRODUCING PLAGABDS WITH sum: CHARACTERS 0R. IMPRINTS.. Y

Arr IIIIIIIIIIIIII UG.19 1111 1. I 1,061,059. Patented May 6, 1913.

UNITED STATES PATENT OFFICE.

HERMANN FLOCK, or LEIPZIG, GERMANY.

METHOD OF PRODUCING PL ACARDS WITH SUN K CHARACTERS R IMPRINTS.

Application filed August 19, 1911. serial lio. 644,953.

i Specification of Letters Patent.

Patented May 6, 1913.

T0 aZZw/wm it may concern:

Be it known that I, HERMANN FLooK, a citizen of the Empire of Germany,and a resident of Leipzig, in the Kingdom of S aX- ony, :Germany, haveinvented certain new and useful Improvements inv Methods of ProducingPlacards with Sunk. Characters or Imprints, of which the following is aspecification.

This invention has reference to a novel method of producing placardswith sunk characters or imprints.

It is the special object of my invention to employ a new method by meansof which aimpression composition where the imprints.

were made and reduced the reflecting effect 80 of such placards withsunk characters if said composition Was not highly polished whichincurred considerable expense. I

It is the special purpose of this invention to overcome the describeddeficiencies and 35. produce placards with sunk characters which possessa highly reflecting effect.

F or the purpose of making the invention entirely clear, reference ismade to the accompanying drawing, in which:

Figure 1 represents in top plan view a deeply engraved metal plate. Fig.2 is a cross section of the entire device. Fig. 3 is a top plan view ofpart of a placard with a layer of metal foil or colored paper after the,46 placard has been embossed. Fig. 4 illustrates in bottom plan view animprinted I transparent cover, and Fig. 5 shows a por-' 'tion'of thefinished placard with the trans parent cover pasted thereon.

Similar characters of-reference denote like parts in all the figures.

In accordance with the present invention a base plate for the impressioncomposition is used consisting of a deep sunk metal plate A with thecharacters thereon in positive form. The tvpe and pictorial designs areaccordingly produced. on this plate exactly in the same sunk form asthey shall appear on the finished placard.

As a counterpart or impression plate a raised or male plate B is usedprepared from the base platewhich has the sunk engraved positivecharacters, said impression plate being preferably made from a.hardening composition such as for instance matrix powder. essentially ofdeXtrin andcolophony powder. Between the deeply-engraved metal plate Aand the impression plate B, the placard is printed. If this raised ormale form is now covered with paper it may be used as an impressionplate for highly polishedmaterial such as metal, metal foil and the likewithout marring or detracting from the luster of the impressed placard.As such surface portion of the raised or male .form does not Suchhardening powder consists,

impair the high polish of metal during the process of imprinting theplacards produced by means of such metal foil show a high re- For thepurpose of obtaining colored or metallic effects on the placards, piecesof colored paper or metal foil D are glued to these portions. ofisaidplacards where imprints are to be made. In accordance with this methodplacards with sunk characters may be produced with a metallic layer or alayer of metallic or colored paper. For increasing the elfect of suchplacards the surface of the deeply engraved metal form is covered with acolor by rolling which then is printed upon a transparent sheet or filmof celluloid, gela- The transparent sheet or tin or the like. filmprinted as described covers the placard with said printed portion sothat only the sunk characters are prominently visible. Such a coveringof the placardprote'cts at the same time the impression against damageor atmospheric influences. Thus if the printed celluloid plate shown inbottom or rear view in Fig. 4:, is secured to the im-, printed placardshown in Fig. 3, then the finished article presents the appearance shownin Fig. 5.

* I' claim as my invention 1. The process of producing placards withsunk imprints consisting in preparing the base plate with sunkcharacters thereon in positive form, producingtherefrom a male platewith raised characters, gluing pieces of fine sheeting of a strikingcolor upon those portions of the placard to be imprinted, plac-vv ingthe placard thus prepared between the base plate and the male plate,producing the portions coincide Withjthe imprints on sa d placard.

' 2. Theprocess of producing placards With :sunk imprints consisting inpreparing the base plate with sunk characters hereon in positive form,producing therefrom a male plate With raised'characters, gluing piecesof metal 'foil upon those portions of the piacardto be imprinted, placiig the placard thus prepared between thebase plate and the maleplate,producing theimprint, applying .color to the base plate, printingtherefrom on a transparent sheet,- and securing said transparent sheetas .a top cover to the placard so that its transparent portions coinsidewith the imprints on said placard.

Signed at Leipzig, G rermany, this 3d day of Augi st 1911.

HERMANN FLOCK.

' Witnesses;

RUDOLPH 151310312, EDUARD MAHNERT

